I've been using AWS for years, and had never heard of OpenStack until this year. The only reason I'm aware of it, is because I'm studying for a degree part tim

I've been using AWS for years, and had never heard of OpenStack until this year. The only reason I'm aware of it, is because I'm studying for a degree part time - and OpenStack is taught in one of the modules. It's a shame really that they only mention AWS and advise against using it in case you accidentally spend money.